<select class="form-control">
    <option value="">--请选择开发语言--</option>
    <option value="Java">Java</option>
    <option value="PHP">PHP</option>
    <option value=".NET">.NET</option>
</select>

<div class="form-group">
    <label class="font-noraml">分组单选</label>
    <select class="form-control">
        <optgroup label="--请选择开发语言--">
            <option value="Java">Java</option>
            <option value="PHP">PHP</option>
            <option value=".NET">.NET</option>
        </optgroup>
        <optgroup label="--请选择数据库--">
            <option value="Oracle">Oracle</option>
            <option value="Mysql">Mysql</option>
            <option value="Sysbase">Sysbase</option>
        </optgroup>
    </select>
</div>

<!-- <style>
    h5 {
        display: inline-block;
        width: 590px;
        /*根据需要调整宽度*/
        height: 26px;
        line-height: 26px;
        text-indent: 15px;
        font-size: 13px;
        font-weight: 100;
    }
</style>
<h5>标题</h5>
<div>内容</div> -->
<style>
    h5 {
        float: left;
        width: 590px;
        /*根据需要调整宽度*/
        height: 26px;
        line-height: 26px;
        text-indent: 15px;
        font-size: 13px;
        font-weight: 100;
    }

    .clear {
        clear: both;
    }
</style>
<h5>标题</h5>
<div class="clear"></div>
<div>内容</div>